How to find simplest rationalising factor
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first convert the irrational number into the smallest rational number for example root 28 = root 7*2*2 = 2root7
now you just have to multiply root 7 by root 7 and you will get the answer
that is you have to multiply the irrational number found with the same number
now you just have to multiply root 7 by root 7 and you will get the answer
that is you have to multiply the irrational number found with the same number
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